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  Ink cartridgesUSPTO Application #: 20070070146Title: Ink cartridges Abstract: An ink cartridge includes an ink chamber including one or more walls, and the one more walls include a film. The ink cartridge also includes one ore more ribs disposed within the ink chamber. Specifically, the one or more ribs contact the film of the one or more walls, and a portion of the one or more ribs is positioned closer to a center of the ink chamber than to an edge of the ink chamber. (end of abstract) Agent: Baker Botts LLP C/o Intellectual Property Department - Washington, DC, US Inventors: Shingo Hattori, Tomohiro Kanbe, Toyonori Sasaki USPTO Applicaton #: 20070070146 - Class: 347086000 (USPTO) The Patent Description & Claims data below is from USPTO Patent Application 20070070146. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] The present application claims priority from Japanese Patent Application No. JP-2005-284646, which was filed on Sep. 29, 2005, Japanese Patent Application No. JP-2005-342686, which was filed on Nov. 28, 2005, Japanese Patent Application No. JP-2005-342687, which was filed on Nov. 28, 2005, and Japanese Patent Application No. JP-2006-081806, which was filed on Mar. 23, 2006, the disclosures of which are incorporated by reference in their entirety. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates generally to ink cartridges. In particular, the present invention is directed towards ink cartridges which may be used in combination with ink jet printers. [0004] 2. Description of Related Art [0005] Ink cartridges which are configured to be used in combination with ink jet printers are known in the art. SUMMARY OF THE INVENTION [0006] A need has arisen for ink cartridges which overcome the shortcomings of known ink cartridges. [0007] According to an embodiment of the present invention, an ink cartridge comprises an ink chamber comprising at least one wall, and the at least one wall comprises a film. The ink cartridge also comprises at least one rib disposed within the ink chamber, and the at least one rib contacts the film of the at least one wall. Moreover, at least a portion of at least one rib of the at least one rib is positioned closer to a center of the ink chamber than to an edge of the ink chamber. [0008] According to another embodiment of the present invention, an ink cartridge comprises an ink chamber comprising a first wall, and at least one second wall. Specifically, at least a portion of the first wall is substantially perpendicular to the at least one second wall, an area of the at least one second wall is greater than an area of the first wall, and the at least one second wall comprises a film. The ink cartridge also comprises an air intake portion positioned at the first wall. BRIEF DESCRIPTION OF THE DRAWINGS [0009] For a more complete understanding of the present invention, the needs satisfied thereby, and the features and technical advantages thereof, reference now is made to the following descriptions taken in connection with the accompanying drawings. [0010] FIG. 1 is a perspective view of multifunction device, according to an embodiment of the present invention. [0011] FIG. 2 is perspective view a refill unit, according to an embodiment of the present invention. [0012] FIG. 3 is a side view showing a state in which a door of refill unit is open, according to an embodiment of the present invention. [0013] FIG. 4 is a cross-sectional view of refill unit of FIG. 2 along the IV-IV line, according to an embodiment of the present invention. [0014] FIG. 5 is a cross-sectional view of refill unit of FIG. 2 along the V-V line, according to an embodiment of the present invention. [0015] FIG. 6 is an expanded, perspective view of the door of refill unit, according to an embodiment of the present invention. [0016] FIG. 7 is a perspective view of a color ink cartridge, according to an embodiment of the present invention. [0017] FIG. 8 is an expanded, perspective view showing an interior of the color ink cartridge of FIG. 7, according to an embodiment of the present invention. [0018] FIG. 9(a) is an interior view of a protector of FIG. 8 as seen from the IXa perspective; and FIG. 9(b) is a cross-sectional view of the protector of FIG. 9(a) along the IXb-IXb line, according to an embodiment of the present invention. [0019] FIG. 10 is a perspective view of a black ink cartridge, according to an embodiment of the present invention. [0020] FIG. 11 is an expanded, perspective view showing an interior of the black ink cartridge of FIG. 10, according to an embodiment of the present invention. Continue reading... Full patent description for Ink cartridges Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Ink cartridges patent application. Patent Applications in related categories: 20080106582 - Liquid tank - A liquid tank includes a liquid chamber for holding liquid and an absorption chamber containing an absorber for absorbing and holding the liquid. The liquid chamber and the absorption chamber are separated by a partition. The partition has a communication part allowing communication between the liquid chamber and the absorption ... 20080106581 - Water-based ink, ink jet recording method, ink cartridge, recording unit, ink jet recording apparatus, and image forming method - A water-based ink of the present invention comprises water, a plurality of different water-soluble organic solvents, and a water-insoluble coloring material, wherein the above water-soluble organic solvents consist of a good solvent to the above water-insoluble coloring material and a poor solvent to the above water-insoluble coloring material, and the ... ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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